Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 39 - SAFETY STANDARDS-GENERAL
Subchapter B - ELECTRIC SAFETY
GENERAL OPERATIONS
Section 39.355 - Maintaining service

(a) When live circuits on which "men at work" tags have been placed are opened automatically, they should be kept disconnected until the chief operator has given proper authorization for reconnection.

(b) When overhead circuits other than trolley and third-rail circuits open automatically, the local operating rules of the employer shall determine in what manner and how many times they may be closed with safety for persons on or near those circuits. The chief operator shall be advised of the conditions.

(c) When circuits feeding supply lines become accidentally grounded, they shall be tested to determine where the ground exists. If the ground cannot be definitely located and removed by the station operator, an immediate report of the finding shall be given to the chief operator, who shall order a patrol of the lines affected to definitely locate and remove the ground as soon as practicable. Above 7,500 volts it will usually be found advisable to disconnect the circuit or effectively ground the accidentally grounded conductor until the lines have been cleared of the accidental ground.